What this MCCB is and what it carries
The Siemens 3VA1180-6EE46-0AA0 is a SENTRON molded case circuit breaker (MCCB) for line protection, with four poles and a TM220 thermal-magnetic overcurrent release. It is rated 80 A continuous at 40 °C and delivers a 220 kA interrupting capacity at 240 V — that is the short-circuit rating that governs selectivity in high-fault panels. The 800 V rated insulation voltage means it is built for 480 V and 600 V class systems with comfortable headroom.
Breaking capacity across voltages
The interrupting curve drops as voltage rises: 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V (–). At 690 V the 17 kA figure is the one to coordinate with downstream gear — no need to oversize the main if the fault current stays under that threshold.
Thermal derating and panel fit
The 80 A rating holds from 40 °C up to 50 °C (–). Above that it derates gradually: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, 74 A at 70 °C (–). If the enclosure ambient runs hot, use the 70 °C figure for the BOM line. The frame measures 70 mm deep by 101.6 mm wide by 130 mm high (–) — standard 4-pole MCCB footprint, no surprises on the DIN rail or gland plate. Maximum power loss is 19.2 W, which matters for thermal rise in a sealed enclosure. Front protection is IP40; the body is not rated for washdown.